Improvement in feed-water heaters for steam-generators



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M CKIQM, OF AUSTlN, NEVADA.

Lettersrlatent No. 85,116,`lcted December 22,' 1868.

IMPROVEMENT IN FEED-WATER HEATERS IOR STEAM-GENBRATORS.

The Schedule' referred to in these Letters Patent and making partvof the same.

' generators; and

It consists in the heads, whichvclose the 'ends of the Water-pipes, constructed with 'detachable covers, and arranged upon the outside of the boiler, and with reference to the side and bottom water-pipes, as-will be hereafter more fully described.y y

' Figure 1 represents a vertical longitudinal section of the generator, through the line a: :e of iig. 2.

Figure 2 is a view of the back end of the generator.

Similar letters bf reference indicate corresponding arts.

p Arepresents a steam-boiler, of ordinary construction, enclosed in the arch B. O represents the tire-grate.

D is the bridge-wall.

On each side of the boiler, extending its whole length, and past each of its heads, and underneath the boiler,

back of the bridge-Wall, a series of tubes, e, is placed, whichV are attached to heads, f, in ,such a manner that a continuous channel for the feed-water is formed from the place of its entrance until it is discharged into the boilenby the pipe g. l

Theheads f, to which the tubes are attached,` are cut out, and a cavity formed between alternate pairs of tubes, so that communication is made between the tubes, and a continuous channel is formed for the Water, as seen in the draining.

.The water is introduced at the arrow, 'g.' 1, and is forced through the tubes, on one side of the boiler, and into the horizontal tier of tubes beneath the boiler, (back of` the bridgewall,) which are arranged in the same manner as those on the side, and already described.

From the horizontal tier of tubes it is forced into the vertical tier on the other side, where its course is upl ward until it reaches the pipe g, which conducts it into the boiler. The heads f are made with detachable-caps or covers, which can be readily removed when it is necessary to clean the tubes. i

The slots or cavities in the heads, between the tubes, by'whicb the channel is made continuous, are marked t.

By this arrangement, the heat, which would other- Wise be absorbed'lby the walls ofthearch, is absorbed by the water,aud conveyed to the'boiler, thus greatly economizng fuel, and adding vastly7 to the steam-generating power of the boiler.

I claim as new, and desire Ato securelby Letters Patent- `The heads` f, .constructed with detachable covers, arranged upon the outside ofthe boiler, and with relaf Ation to the side and bottom pipes e, as herein shown and described. D. F. MGKIM. Witnesses:

WM. TOWLE, 'DI W. WELfrY. 

